The primary goal of the MomZing web-enabled Program is to increase home-based moderate-to-vigorous physical activity (MVPA) minutes per week in new mothers. Phase II activities will include: 1) programming the MomZing multimedia web enabled Program, a recruitment website, and online survey; 2) producing 98,10-minute video segments showing women exercising with or without an infant; 3) conducting iterative usability testing of the features and content of the Program; and, 4) conducting a randomized trial of the efficacy of the Program with 572 new mothers recruited from across the U.S. New mothers will be randomly assigned to receive either the MomZing web-enabled TV Program or a standard exercise DVD designed for new mothers. The primary outcome will be minutes per week of leisure-time moderate to vigorous physical activity measured at baseline, 4 and 12 weeks. Secondary outcomes include changes in fatigue, sleep, depressive symptoms, tobacco and alcohol use at 12 weeks. Process evaluation will also determine extent to which the technology is utilized (frequency of use and time per access) over 12 weeks in both conditions. We will investigate whether key demographic (i.e., weight of infant, number of children) physiological (i.e., body mass index), and lifestyle factors (sleep quality, fatigue) act as mediators or moderators of any change in physical activity.